Improvement in wood-tubning lathes



JOHN McMI-CHAEL, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR I vTO JOSEPHWRGHT, 0F SAME PLACE.

Letters Patent No. 61,442, dated January 22, 1867.

IMPROVEMENT IN WOOD-TURNING LATHES ltlgr .irlgehuli utenza in imilgete'etters gnant inn mating gmt nf fige same.

To ALL WHoM 1T MAY concerts;

Beit known that I JOHN McMrcn-AnL, of thc city and county ofPhiladelphia, and State oiY Pennsylvania, have invented a new and usefulMachine for Turning Umbrella '.lips, Handles, and other work and I' dohereby declare' that the following is a, full and exact descriptionthereof, reference being had to the aocompariy'mgdrawings, and to theletters of reference marked thereon.

The nature of my invention and improvement consists, i'n the firstplace, of a novel mode of bringing thc 'work to the cutters; secondly,of an expeditious mode of securing the pieces to be turned, andldisconnecting them from the mandrel; thirdly, oi' a mode of regulatingthc diameter of tho pieces, with otherl novelties, all of which will beunderstood by thc i`ollowing description. In the accompanying drawings-Figure 1 is a side elevation of the improved machine.

Figure 2 is an end elevation.

Figure 3 is a plan of ditto.

Figure el: is a side elevation of the rocking-frame H.

Figure 5 is au end elevation of ditto.

Figure 6- is an isometrical viewof .the wedge D for regulating one ofthe cutter-heads.

Lilie letters in all the figuresindicate the same parts.

A is the standing frame of -the machine. B B are cutter-heads, securedon the bed-plate C by means of the screw-bolts.a,therebeing;longitudinal slotsrluim the anges cA of ythe heads fortheglpngitudinaladjustment gf y the latter and cross-slots, d, in thebed-plate for their lateral adjustment, and also 'for thepurpose ofplacing 'them on angles for changing the sizes and proportions of the"tips. The slots b d are shown in fig. 3. Each head'B and B is dividedinto two parts, 1 and 2, the wedge D beinginterposed between them, forelevating the cutter mandrel E as the cutter is reduced in diameter bywearing.4 The three pieces in each head are held. together by means ofthe screw-bolts c, as seen in iig. l. The wedges D Dare adjusted bymeansof the set- A screws F F in the uprights ff, the lattdr beingbolted at their lower end to the parts 1 1 of the headsB and B',

and at the upper cndto the parts 2'2, as seen in figs. 1 and 2, therebeing screw-slots in the uprights to allow the elevation of said parts.The wedge is shown in detail 'in fig. 6.v The slots g y admit of theadjustment of the wedge, the confining screws e passing through them.The cutter G, on the mandrel E, is for taking the rough o the pieces tob e turned, and reducing them. to nearly their right size, and thecutter G', on the mandrel E', is.to give them their proper form ands'ize. The frame H secured to the rocking-shaft I, whosejournals, h,turn in the boxes z', of the standing frame A, is for the purpose o fVholdingthe pieces to be turned. The said Y pieces have long countersunkholes in one end which fit the centre j of the mandrel J, to confinethem thereto. The said mandrel is connected with the driving-shaft K, bymeans of the pulleys L L and belt M. The stand ing centre j is securedin the mandrel N, of the adjustable head O, on the shears k of the,rockingframe H. The mandrel N is made to slide in the head O, therebeing a knob, Z, onI the outer end of the mandrel for the operator totake hold of, to push it forward vto engage the centre j with the pieceto be turned. The apr-ing m on the sliding-rod u bearing against thestud o, which connects the rod with the mandrel, thrnws the latter backwhen the operator releases his hold to free the centre l7" 'from vthework. I The rocking-frame H is adjusted inits stoppages, back and forthto -the cutters G and G', by means of thc set-screwsp and p', as seen ings. 1,2, und O is a -lc r for removing the work from the centre j. It ishung on the pivot q, and has a hole through which the centrej passesfreely. The lever is operated by the longitudinal lever P, which, ashereinl after described, is actuated by Athe lever Q connected with theupright R, by means of the fulcrum pin 1'. The sa-id lever P is held atits outer end up against the lever Q by means of the spring S, the upperond of which is connected with the ceiling, or somo other object abovethe machine. T'is a rocking-shaft in the head U, vfor bringing the workalternately to the cutters; it is connected to the rocking-frame H bymeans of the slotted cam V, and the stationary urm s, the inner end ofthe arm being bolted to the frame, and the outer end connected with thecam by means of the pin t, which passes through the slot u of the cam.There'is a hollow upright, W, connected at its lower end with the outerend of the rocking-shaft T, there being a spring, X, in the 1upright,which bears at its upper end under the outer end of the lever Q. Y is asliding handle, on the upper end of the upright W,Qr-Athe-doublepuipese. of rocking the shaft T, ando preting the lever Q,the outerei'nifot whichihe l an up-':1nddow n,motion in the slots y117iin the upright.

The operation is as .follows A piece to be turned being placed betweenthe tivo centresj endl-:md the cutters Gl :indG'fsbeing revolved in thedirection of the :ir-rows, by the belt Z,' which. connects: the Vpulleys12;

on their` mondi-els, vwith thcjeounter-sheft, the operator, byvueans otthe sliding hndle Y, turns'the roeking-shaft T, until the com V hnsbrought the rocking-frame H to beur :igainstthe set-screw '12... Bythis4 operationftbe cutter G has takenthe rough ofithe piece und reducedit4 tonearly its -right size,Y He then` by the reverse..

motionof the cam brings thevorlr,l against the cutter G', which reducesitv to-itsqrght size :ind form"by'the: 1 tim'e the frame H is brought-tohear aginst theset-screw p', Then hc tin-ns the'rock-sbaft Tsenstodisengzigcl;` the work from the cutter, ondpushes the handle Ydoivnn'lards, :incl eonsequentlygives the -le'ver Q a. downward' 'Imotion,A which operatesthe lever P, und through its nietion the verticallever'O, soos to tbronv the irork .i'i'elxizv the centre j; he havingpreviously released his hold of the knob', Ato disengage the backcentrejfrom-thework. Then the lia-ndlc Y is allowed to ascend into its formerposition, the spring X-bearingt upwards with: the lever Q. The spring Salso pulls the lever P upwards, and the vertical lever O is `also'brugght back by the@ .spring w to its former position. he arrangement ofthis springis sh'oivn in detail izi'g. 4.' v It will be iedily'- seenthat my' machine is susceptible of various modifications withoutdeparting fromtrhe main' principii-sof its construction. Forinstnnee,instead of h eving it to move the werkte-the cutters, the lntterunay bemoved to the work. alternately, by placing the cutter-heads on nrocking-frame, or ono. bed-platewbchslmll hnvee reeiprof eating motionimparted to it, as it'slides on shears by means of u .roeknnd pinionorother equivalent device,

Having thus described my invention, what I claim therein as new, anddesire to secure byLetters Patenn'is'- l. The rocking-frame ll, arrangedwit-h the cuttei's G endif', unfllthc standing frame subst-nntielly'nsliei'einbefore described, und for the purposes specified.

2. Combining the cam V with-the rocking-shaft l, und rocking-freine H,for giving u reciprocating motion to the lutter', substintiully es undfor the purpose above described.

3. 'lhe combination of the cam-lever O, with the ccntrej, and lever P,the latter beingl operated bythe lever'Q,` or its equivalent,substantially as und for the purpose set forth.

4. Arranging the sliding handle Y, and spring X, with the upright W, forthe de uble purpose of giving u' rocking motion to the `frame H, bymennsof the cam V, und actuating the cam-lever O, through the intermediate llevers P Q, substantially as described and for the purposes .specific Intestimony that the :ih vc is my invention, I have hereunto set my' handand affixed my seni this 14th doy of November. 1866.

Y JOHN MeMICHAEL. [r..

lVitneSses STEPHEN Usrtcx. Jeux WHITE.

